| Texto completo | |
| Autor(es): |
Matusalem, Filipe
[1]
;
Koda, Daniel S.
[1]
;
Bechstedt, Friedhelm
[2]
;
Marques, Marcelo
[1]
;
Teles, Lara K.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] ITA, GMSN, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[2] Friedrich Schiller Univ, Inst Festkorpertheorie & Opt, Max Wien Pl 1, D-07743 Jena - Germany
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SCIENTIFIC REPORTS; v. 7, NOV 16 2017. |
| Citações Web of Science: | 14 |
| Resumo | |
Growth of X-enes, such as silicene, germanene and stanene, requires passivated substrates to ensure the survival of their exotic properties. Using first-principles methods, we study as-grown graphene on polar SiC surfaces as suitable substrates. Trilayer combinations with coincidence lattices with large hexagonal unit cells allow for strain-free group-IV monolayers. In contrast to the Si-terminated SiC surface, van der Waals-bonded honeycomb X-ene/graphene bilayers on top of the C-terminated SiC substrate are stable. Folded band structures show Dirac cones of the overlayers with small gaps of about 0.1 eV in between. The topological invariants of the peeled-off X-ene/graphene bilayers indicate the presence of topological character and the existence of a quantum spin Hall phase. (AU) | |
| Processo FAPESP: | 14/13907-7 - Propriedades físicas de materiais bidimensionais |
| Beneficiário: | Lara Kühl Teles |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |